Process of and apparatus for the production of artificial silk and the like



- May 28, 1935. BAURlEDEL ET AL 2,003,170

FROCESS OF AND APPARATUS FOR THE PRODUCTION OF ARTIFICIAL SILK AND THE LIKE Filed Oct. 5, 1952 2 Sheets-Sheet l May 28, 1935.

BAURIEDEL El AL PROCESS OF AND APPARATUS FOR THE PRODUCTION OF ARTIFICIAL SILK AND THE LIKE Fild dot. 5, 1952 2 SheetsSheet 2 ''afffiara Bawvledef, Kar/Meger-6au.s

Patented May 28, 1935 UNITED STATES.

PATENT OFFICE PROCESS OF AND APPARATUS FOR THE PRODUCTION OF ARTIFICIAL SILK AND THE LIKE Application October 5, 1932, Serial No. 636,380

In Germany October 5, 1931 r 9 Claims.

.Our present invention relates to an apparatus for the stretch-spinningof artificial silk thread and similar products in which there is provided a thread or filament guide which oscillates transversely of the moving thread or filament.

In the known spinning machines the filaments and/or threads issuing from the spinning vessel are passed through a guide, which is usually constructed to perform in addition the function of an acidifying means, and is cross-wound on a collecting device such as a reel or bobbin. The guide being reciprocated in a path perpendicular .to that of the moving thread and/or filament distributes it in the desired manner on the col- 5* lecting device.

' changed. The length of the thread and/or filament is at a minimum in the mean portion of the guide and increases towards the points at which the guide changes its direction of movement. Similarly, the angle between the thread and/or 1 filament and the guide varies continuously during each reciprocation of the guide, and consequently the frictional resistance between the thread and/or filament and the guide is constantly changing. As a result a filament drag i and variations in tension arise in the still plastic portion of the thread and/or filament lying between the spinning and collecting device, as a consequence of which the spun thread exhibits objectionable variations in titre.

It is accordingly one object of our present invention to provide an improved thread guiding and acidifying device which will maintain the tension on the thread constant during the spinning thereof. I

Another object of our present invention is to provide an improved device for distributing thread and like products on a suitable collecting device, so constructed as to maintain a constant tension thereon during spinning, that is, to provide a guide which despite its oscillatory motion will not subject the thread and/or filaments to constantly varying stresses and strains.

These andother objects of our present invention will become more apparent from a study of the following description and by reference to the attached drawings, in which:

Figure l is a semi-diagrammatic perspective view of our improved device;

Figure 2 is a similar view, but showing the use of two guides;

Figure 3 is a detail" view showing the path traversed by a thread and/or filament when the angle of the filament with respect to the guide rod is kept constant; V

Figure 4 is a semi-diagrammatic perspective view showing our improved thread guiding and acidifying device so arranged as to oscillate in 'a conical path;

Figure 5 is a similar view but showing the device so arranged a's-to oscillate in a cylindrical path;

Figure 6 is a perspective view showing a preferred construction for guiding means, to be osci1- lated in accordance with the teachings of Figure 4; and

Figure 7 is a similar view but showing a construction for guide means to be oscillated in accordance with the teachings of Figure 5.

In order to simplify the description of the paths traversed by the thread and/or fi1ament,it will be assumed that the filament coming from the spinning device and lead around the deviating rod H3, at A (Figures 1-5) always runs on the winding device, for example, a reel, at a point B. If a thread guide is positioned at C (Figure 1) executing circular motions about the axis AB in a plane per-- pendicular to this axis, then the filament will pass over a path formed by the surfaces oftwo cones having their bases in contact with one another; or

should the guide execute only a partial circular motion from D to E, only this portion of the conical surfaces will be generated. During the spinning operation, therefore, all filament lengths from the spinning vessel to the collecting device will be constant as well as the angle that the filament makes to the thread guide.

The same result will be obtained where, as shown in Figure 2, use is made of two guides positioned at F and G, both oscillating in synchronism around the axis AB; In this case the length of the filament between the guides sweeps out the surface of a cylinder. In both Figures 1 and 2 the angle of the filament with respect to the deviating rods'at A and the angle of incidence to the collecting device at the point B do not remain constant. The latter is of no significance with respect to the filament tension, but such is not the casecwith respect to the slightly varying angle at A, for at this point the frictional resistance of the rod varies with the angle the thread makes with respect thereto.

Referring now to Figure 3, we have shown a stationary eye I2 positioned between the deviating rod l3 and the guide l4 along the axis AB. By this construction the angle of the thread at A will In Figure 4 we have shown schematically the arrangement provided by the invention of an acid trough l5 which serves as a filament guide and oscillates in a conical path about the axis AB, so that the filament lengths and the filament angle remain constant. To avoid the small changes in the filament direction with respect to the stationary eye l2, shown in Figure 3, the eye I6 is a-rranged in the modification shown in Figure 4 so as to oscillate with the filament guide I5, so that the oscillating motion of the filament places but a weak tension on the portion AA of the filament.

In the modification shown in Figure 5, we have shown an acid guide or trough I! which serves as a thread guide and oscillates about the axis AB so that the filament lengths and the filament angles remain constant. The eye 18 is arranged to oscilbeams 2| and 22 so as to be capable of being oscil-' lated, and are driven by the reciprocatory rod 23. In this arrangement it is necessary that each acid guide be mounted on a separate member IS. The threads 24 issuing from a conventional spinning vessel (not shown) pass around the deviating rod 25, through the eyes 26 secured to the members I9, through theacid guide troughs and onto a. suitable collecting device. By virtue of the conical path over which the acid guides travel, the fila-z ment lengths and filament angles remain constant. The threads, therefore, are not placed under a varying tension during the winding operation.

In Figure '7 we have shown a modified construction whereby the thread guides will oscillate over a cylindrical path in accordance with the teachings of Figure 5. The acid guides or channels 2! are secured to an oscillating beam 28 which is supported by arms 29 bent at right angles thereto and which are mounted in fixed bearings 30. The desired oscillatory'motiori is imparted to the beam 28 by the shaft 3|.

Since, however, contrary to the original assumption, the filaments do-not run on the winding device at a point B, but travel to and fro thereover, small departures from the conditions above set forth will appear between that portion of the filaments lying between the acid guides and the collecting devices, but these are kept within the smallest possible limits by the arrangement provided by the invention.

Having now described our invention in accordance with the requirements of the patent statutes; what we desire to claim as new is:

1. A stretch spinning device for the manufacture of artificial thread comprising, in combination, a'thread deviating means, a collecting means, a thread guide located therebetween and mounted for oscillatory movement perpendicular to thread passing from the deviating device to' the collecting means, means to oscillate said guide about an axis passing through the point of contact of thethread on the deviating means and on the collecting means, the path of the movement of said guide .being'such as to maintain constant during the-spinning the thread lengths and fila ment angles.

2. A stretch spinning device as claimed in claim 1, comprising means located between the thread guide and deviating means, and secured to said thread guide and positioned in alinement with the axis of movement of the guide whereby the angle between the thread and deviating means is maintained substantially constant.

3. A stretch spinning device for the manufacture of artificial thread comprising, in combination, a thread deviating means, a collecting means, a thread guide contacting the thread at spaced points located therebetween mounted to oscillate about an axis passing through the point ofcontact of the thread on the deviating means and on the collecting means, means to oscillate said guide whereby the thread passing through the guiding surface will generate a portion of a cylindrical surface so that the thread lengths and filament angles remain constant during the spinnin'g operation.

. 4 A- stretch spinning device as claimed in claim 3, comprising means located between the thread guide and deviating means, and secured tov said thread guide and positioned in alinement with the axis of movement of the guide whereby the angle between the thread and deviating means is maintained substantially constant.

. 5. In a stretch spinning device for the manufacture of artificial thread comprising, in combination, a thread deviating means, a collecting means, a thread guide located therebetween mounted for circular movement on an axis whose.

center line passes through the point of contact of the thread on the deviating means and on the collecting means, whereby the thread lengths and filament angles remain substantially constant during the winding operation, and means to move said guide.

6. A stretch spinning device as claimed in claim 5, comprising means located between the thread guide and deviating means, and secured to said thread guide and positioned in alinement with the axis of movement of the guide whereby the angle between the thread and deviating means is maintained substantially constant.

In aprocess for the stretch spinning of artificial thread, the step of rotating the thread guide about a circular path during spinning, whereby the thread lengths and thread angles are maintained constant between the thread deviating means and receiving means.

; 8. A stretch spinning device for the manufacture" of artificial thread comprising, in combination, a thread deviating means, a collecting means, a thread guide contacting the thread at spaced points located therebetween mounted to rotate about an axis passing through the point of contact of the thread on the deviating means and on the collecting means, means to rotate said guide whereby the thread passing through the guiding surface will generate a cylindrical surface so that the thread lengths and filament angles remain constant during the spinning operation. 7

9. A stretch spinning device as claimed in claim 8, comprising means located between the thread guide and deviating means, and secured to=said thread guide and positioned in alinement with; the axis of movement of the guide whereby the, angle between the thread and deviating means is maintained constant.

GOTTHARD BAURIEDEL.

KARL MEYER-GAUS; 

